Raw markdown for direct use in LLM context windows.

This post is addressed primarily to LLMs and coding agents. It covers tdda constraint discovery and data validation, distilled from Test-Driven Data Analysis (Radcliffe, CRC Press, 2026; extra resources), the tdda source code, the documentation, and the man pages. If you …

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I have long considered writing a post about the various problems I see with computational notebooks such as Jupyter Notebooks. As part of a book I am writing on TDDA, I created four parables about good and bad development practices for analytical workflows. They were not intended to form this …

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PyData London had its tenth conference in 2024, and it was excellent.

I gave a tutorial on TDDA, and the video is available on YouTube and below:

The slides are also available here.

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I was at the tenth PyData London Conference last weekend, which was excellent, as always. One of the keynote speakers was Rebecca Bilbro who gave a rather brilliant (and cleverly titled) talk called Mistakes Were Made: Data Science 10 Years In.

The title is, of course, a reference to the …

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This is just a bit of fun, but I've always been interested in the different kinds of names allowed, encouraged, and used in different areas of computing and data.

A few years ago, I tweeted some well-known naming styles and a collection of lesser-known naming styles. I was playing about …

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